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The contact hypothesis has proven to be highly effective in alleviating prejudice directed toward homosexuals. [24] Applying the contact hypothesis to heterosexuals and homosexuals, Herek (1987) found that college students who had pleasant interactions with a homosexual tend to generalize from that experience and accept homosexuals as a group. [25]
For example, if a substrate has nano/microgrooves running parallel to each other, cells orient along the direction of these nano/microgrooves. [ 9 ] [ 10 ] [ 11 ] Based on this, cells seem to be able to sense the structural characteristics of their surrounding and consequently respond by adopting the orientation of topographical stimuli.
A scene of a first contact between aliens and humans in Robert Sheckley's 1952 short story "Warrior Race". First contact is a common theme in science fiction about the first meeting between humans and extraterrestrial life, or of any sentient species' first encounter with another one, given they are from different planets or natural satellites.
A variable in an experiment which is held constant in order to assess the relationship between multiple variables [a], is a control variable. [2] [3] A control variable is an element that is not changed throughout an experiment because its unchanging state allows better understanding of the relationship between the other variables being tested.
The history of scientific method considers changes in the methodology of scientific inquiry, not the history of science itself. The development of rules for scientific reasoning has not been straightforward; scientific method has been the subject of intense and recurring debate throughout the history of science, and eminent natural philosophers and scientists have argued for the primacy of ...
Pictet's experiment: Marc-Auguste Pictet: Demonstration Thermal radiation: 1797 Cavendish experiment: Henry Cavendish: Measurement Gravitational constant: 1799 Voltaic pile: Alessandro Volta: Demonstration First electric battery: 1803 Young's interference experiment: Thomas Young: Confirmation Wave theory of light: 1819 Arago spot experiment ...
Primary sources may or may not be independent or third-party sources. A scientific paper documenting a new experiment conducted by the author is a primary source on the outcome of that experiment. Secondary sources provide an author's own thinking based on primary sources, generally at least one step removed from an event. It contains an author ...
For example, if the fertilizer was spread by a tractor but no tractor was used on the unfertilized treatment, then the effect of the tractor needs to be controlled. A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable (i.e. confounding variables). [1]